Patents by Inventor Philippe N'Guyen

Philippe N'Guyen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system to decode image watermarks
    Patent number: 7085398
    Abstract: In a device and a method for the determining local geometrical variations that have occurred in data, the data comprise a reference pattern X. The method comprises, for example, the following steps: modeling the local geometrical variations by means of an index variable J, said variable making it possible to place the samples of the distorted data in correspondence with those of the original data, estimating the local variations by using the reference pattern X included, a model of local distortion of the data and the distorted data.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: August 1, 2006
    Assignee: Thales
    Inventors: Séverine Baudry, Philippe N'guyen
  • Method for inserting a watermark into an image
    Patent number: 7058979
    Abstract: A process for watermarking images that includes embedding into the images before their transmission a message by modifying the data characteristic of the images. Further, a co-watermarking is performed by periodic embedding of a binary matrix into the image to determine on reception the co-ordinates of the origin of the initial image and allow the registration of the images received relative to this origin so as to make it possible to read the embedded message. Such a process may find particular application to the transmission of stationary or video images.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: June 6, 2006
    Assignee: Thales
    Inventors: Séverine Baudry, Didier Nicholson, Catherine Simon, Philippe N'Guyen
  • Method and system to decode image watermarks
    Publication number: 20040001626
    Abstract: In a device and a method for the determining local geometrical variations that have occurred in data, the data comprise a reference pattern X.
    Type: Application
    Filed: January 8, 2003
    Publication date: January 1, 2004
    Inventors: Severine Baudry, Philippe N'guyen